Prior to filling, the MEGC shall be inspected to ensure that it is authorized for the gas to be carried
and that the applicable provisions of ADR have been met.
Elements of MEGCs shall be filled according to the working pressures, filling ratios and filling
provisions specified in packing instruction P200 of 126.96.36.199 for the specific gas being filled into each
element. In no case shall an MEGC or group of elements be filled as a unit in excess of the lowest
working pressure of any given element.
MEGCs shall not be filled above their maximum permissible gross mass.
Isolation valves shall be closed after filling and remain closed during carriage. Toxic gases (gases of
groups T, TF, TC, TO, TFC and TOC) shall only be carried in MEGCs where each element is
equipped with an isolation valve.
The opening(s) for filling shall be closed by caps or plugs. The leakproofness of the closures and
equipment shall be verified by the filler after filling.
MEGCs shall not be offered for filling:
(a) when damaged to such an extent that the integrity of the pressure receptacles or its structural or
service equipment may be affected;
(b) unless the pressure receptacles and its structural and service equipment has been examined and
found to be in good working order; and
(c) unless the required certification, retest, and filling marks are legible.
Charged MEGCs shall not be offered for carriage;
(a) when leaking;
(b) when damaged to such an extent that the integrity of the pressure receptacles or its structural or
service equipment may be affected;
(c) unless the pressure receptacles and its structural and service equipment have been examined
and found to be in good working order; and
(d) unless the required certification, retest, and filling marks are legible.
Empty MEGCs that have not been cleaned and purged shall comply with the same requirements as
MEGCs filled with the previous substance.
Portable tank instructions and special provisions
This section includes the portable tank instructions and special provisions applicable to dangerous
goods authorized to be carried in portable tanks. Each portable tank instruction is identified by an
alpha-numeric code (e.g. T1). Column (10) of Table A of Chapter 3.2 indicates the portable tank
instruction that shall be used for each substance permitted for carriage in a portable tank. When no
portable tank instruction appears in Column (10) for a specific dangerous goods entry then carriage of
the substance in portable tanks is not permitted unless a competent authority approval is granted as
detailed in 188.8.131.52. Portable tank special provisions are assigned to specific dangerous goods in
Column (11) of Table A of Chapter 3.2. Each portable tank special provision is identified by an alphanumeric
code (e.g. TP1). A listing of the portable tank special provisions is provided in 184.108.40.206.
NOTE: The gases authorized for carriage in MEGCs are indicated with the letter "(M)" in Column
(10) of Table A of Chapter 3.2.
Portable tank instructions
Portable tank instructions apply to dangerous goods of Classes 1 to 9. Portable tank instructions
provide specific information relevant to portable tanks provisions applicable to specific substances.
These provisions shall be met in addition to the general provisions in this Chapter and the general
requirements in Chapter 6.7.
For substances of Class 1 and Classes 3 to 9, the portable tank instructions indicate the applicable
minimum test pressure, the minimum shell thickness (in reference steel), bottom opening
requirements and pressure relief requirements. In portable tank instruction T23, self-reactive
substances of Class 4.1 and Class 5.2 organic peroxides permitted to be carried in portable tanks are
listed along with the applicable control and emergency temperatures.